Fountain paint roller assembly



R. G. LELAND FOUNTAIN PAINT ROLLER ASSEMBLY June 2, 1964 2 Sheets-Sheet1 Filed May 4, 1962 INVENTOR. E4G/VV4Z0 6. 454mm,

m 1954 R. G. LELAND FOUNTAIN PAINT ROLLER ASSEMBLY 2 Sheets-Sheet 2Filed May 4, 1962 INVENTOR. P46Nl/4L0 G. 454 4M0,

47'7-OEIVEYS.

3,135,006 Patented June 2, 1964 3,135,006 FOUNTAIN PAINT ROLLER ASSEMBLYRagnvald G. Leland, 2334 W. 241st St., Lomita, (Ialif. Filed May 4,1962, Ser. No. 192,366 11 Claims. (Cl. 15-575) This invention relates toa novel fountain paint roller assembly.

The primary object of the invention is the provision of a generallysuperior, more efficient, and timeand labor-saving assembly of the kindindicated, which eliminates dripping and spilling of paint, unevenloading of the roller element with paint, and the frequent transfer ofthe roller between the work and a paint receptacle as required withconventional paint rollers.

Another object of the invention is the provision of an assembly of thecharacter indicated above which has novel manually operated valve means,which is adapted to be moved from a spring-pressed fully closed, topartially open, and fully open positions, in conjunction with passages,whereby even flow of paint from a reservoir to and along the roller isprovided for.

A further object of the invention is the provision of a compact, easilyhandled assembly of the character indicated above, wherein the paintroller component is a conventional paint roller and the reservoir,including the valve means, is a separate accessory, adapted to bequickly and easily applied to the paint roller, the reservoir beingadapted to be merchandized as a separate unit, and being adjustable tofit paint rollers of different lengths.

Other important objects and advantageous features of the invention willbe apparent from the following description and the accompanyingdrawings, wherein, for purposes of illustration only, a specific form ofthe invention is set forth in detail.

In the drawings:

FIGURE 1 is a front elevation of an assembly of the present invention;

FIGURE 2 is a contracted right-hand elevation of FIGURE 1, showing thereservoir positioned for overhead painting;

FIGURE 3 is a view like FIGURE 2, showing the reservoir positioned forpainting a vertical surface at a level below the level of the hands of astanding operator of the assembly;

FIGURE 4 is an enlarged horizontally contracted front elevation of theassembly, showing structural details;

FIGURE 5 is a right-hand end elevation of FIG- URE 4;

FIGURE 6 is a horizontally contracted rear elevation of the assembly;

FIGURE 7 is a verticalv longitudinal section taken on the line 7-7 o'fFIGURE 5;

FIGURE 8 is a fragmentary vertical transverse section taken on the line8-8 of FIGURE 7;

FIGURE 9 is an exploded perspective view of the reservoir mounting andstop means, associated with the valve chamber and a fragmentary portionof the reservoir; and

FIGURE 10 is a perspective view of the rotary valve core.

Referring in detail to the drawings, wherein like numerals designatelike parts. throughout the several views, the illustrated assembly iscomposed of a substantially conventional manual paint roller unit 12,and a novel paint reservoir unit 14.

The paint roller unit 12 comprises a frame having a normally horizontalshaft 18 on which an absorbent roller 16 is journaled, and whichterminates, at preferably its right-hand end, in a right-angleddownwardly extending portion 20 which merges, at its lower end, in ahorizontal arm 22, shorter than the shaft 18, to whose free end is fixeda perpendicular handle bar 24, having a handle 26 on its lower end. Theshaft 18 is somewhat longer than the roller 16, so that the left-handend 28 i of the shaft extends beyond the adjacent end of the roller,

and the right-hand end of the roller is spaced from the portion 20.

The paint reservoir unit 14 comprises a reservoir 30 of teardropvertical transverse cross section, which has an arcuate top wall 32 andstraight flat front and rear walls 34 and 36, respectively whichconverge downwardly toward each other, and fiat parallel end walls 38.As shown in FIGURE 8, the rear wall 36 is straight throughout its lengthand width, and has a lower edge 40, adapted to bear upon the peripheralsurface of a paint roller 16, at a retreating angle, and has downwardlyflaring, evenly spaced notches 42 opening thereto.

A lower portion 44 of the front wall 34 is angled forwardly relative tothe remainder of the front wall, so as to be approximately normal to thesurface of the roller 16. The lower portion 44 together withthe lowernotched part of the rear wall 36, the end walls 38, and downwardlycurved ends 46 on the portion 44, define a valve chamber 48. The lowerportion 44 is indented at equally spaced intervals therealong, withvertical channels 50, which face into the chamber 48 and open, at theirlower ends, only to the surface of the roller 16.

An L-shaped spring mounting bracket 52 has a vertical arm 54 suitablyfixed to the forward side of the front wall lower portion 44, at themidlength point of this portion, and has a forwardly extending arm 56,upon which is fixed, as indicated at 58, the center of a downwardlybowed leaf spring 60. The spring 60 is somewhat shorter than and extendslengthwise in the valve chamber 48, and has outwardly and downwardlycurved ends 62, which bear upwardly against the bottom of a rotary valvecore 64.

As shown in FIGURES 8 and 10, the valve core 64 comprises an elongatedcylindrical rod 66 having paint passages evenly spaced along one sidethereof, preferably in the form of notches 68, which are spaced at thesame distance apart as and are adapted to be registered with thechannels 50 in the front wall portion 44, and the notches 42 in thelower end of the rear wall 36 of the reservoir 30, when the valve coreis in place in the chamber 48. As shown in FIGURE 8, the valve core isof a diameter to fit rotatably in and close a restricted throat 69defined between the upper end 70 of the front Wall portion 44 and therear reservoir wall 36, on a level abovethe channels 50 and the notches42. The core 64 is normally in its closed position, wherein its notches68 are uppermost, as shown in FIGURE 8, and has a fixed rearwardlyextending handle 72, which extends rearwardly through and worksvertically in a vertical slot 74, provided in the lower portion 44 ofthe front" reservoir wall 34. The'handle 72, terminates in a rearwardlyand upwardly angled portion 76, having'a terminal 78 which is adapted tobear upwardly against the front surface of the front reservoir wall 34,above its lower portion 44, so as to maintain the core 64 in its closedposition. The leaf spring 60 holds the core 64 in occluding relation tothe throat 69, in all rotated positions of the core.

In operation, when it is desired to have paint feed gravitationally fromthe reservoir 30 to the paint roller 16, the valve core handle 72 isdepressed so as to register the notches 68 of the core with the channels50 of the front wall portion 44, either fully for full flow of paint tothe channels, or only partially for a diminished flow of paint thereto,and hence to the surface of the roller 16. The notches 42 in the loweredge of the rear reservoir wall 36, and the teeth 80 defined between thenotches 42, serve to evenly distribute over the surface of the roller,the paint flowed thereto in the chamber 48.

The above described reservoir unit 14 is mounted to the paint rollerunit 12, by means of an adjustable left hand bracket 82 and anadjustable right-hand bracket 84. The left-hand bracket 82 comprises aflat arm 86, having a lateral arm 87 which slides through the open outerend of an outset channel 89 formed in the lower portion 44 of the frontreservoir wall 34. The arm 86 is traversed, adjacent to its lower end,by the left-hand end 28 of the roller shaft 18, with a spacer 88, on thearm, circumposed on the shaft between the bracket arm 86 and theadjacent end of the roller 16.

The adjustable right-hand bracket 84, as shown in detail in FIGURE 9,comprises a flat arm which is composed of a lower portion 90, adapted toextend lengthwise of the portion on the roller shaft 18 and an upwardlyand forwardly angled upper portion 92. The upper portion 92 has on itsupper edge a flat longitudinally inwardly extending arm 94, which slidessupportably through a slot 96, provided in the adjacent end of aforwardly outset channel 98 formed in the lower portion 44 of the frontreservoir wall 34, and slidably and supportably engages in the channel,whereby the bracket 84 is adjustable toward and away from the right-handend of the reservoir, for accommodating roller units of differentlengths. The adjustability of the brackets 82 and 84 enables extendingor retracting the brackets, relative to the reservoir 30, to accommodatepaint rollers of different lengths, while maintaining the reservoircentered relative to the rollers.

The lower portion 90 of the bracket 84 is provided with longitudinallyspaced upper and lower holes 100 and 102, respectively, which aresurrounded by conical spacers 103 and 105, respectively, which projectlaterally inwardly from the bracket, and engage the right-hand end of apaint roller 16, for spacing the same from the bracket 84. The upperhole 100 is adapted to receive the shaft 18 of the roller frame, where asmall diameter roller is used, the hole 102 being provided to receivethe shaft 18 of a larger diameter roller when such is used.

The lower bracket portion 90 has, on its upper edge a laterallyoutwardly extending stop lug 106, which is provided for stop engagementwith the upper edge of a retaining plate 110, for retaining thereservoir 30, in an upstanding rearwardly over-balanced position,relative to the roller unit 12, as for overhead painting, as shown inFIGURES 2 and 5. The lower edge of the upper bracket portion 92 ismutilated to provide a laterally outwardly extending stop lug 108,disposed at right angles to the stop lug 106 for retaining the reservoirunit 14 in a rearwardly overbalanced position, as in FIGURE 3 with thehandle 26 of the roller unit extending upwardly from the reservoir unit14, as shown in FIGURE 3, as when painting a part of a wall W, on alevel below the hands of a standing operator of the assembly. The lug108 is engaged in the slot of the retaining plate, as shown in FIGURE 3.

The retaining plate 110 is flat and elongated, has a rounded upper end112 and a squared lower end 114, a hole 116 adjacent to its upper end,and a longitudinal slot 118 opening to its lower end. The retainingplate 110 is positioned at the laterally outward side of the bracket 84,with the roller shaft 18 extendingthrough the hole 116, and with theslot 118 engaged over the arm 22 of the roller handle bar 24, wherebythe retaining plate extends along the portion 20, in the plane of thehandle bar 24 and is secured in non-rotatable relationship thereto.

A filler plug 120 is provided in the arcuate top wall of the reservoir30, and, when the paint is low in the reservoir 30 and tends to movesluggishly to the valve core 64, the plug 120 can be turned out farenough to provide additional access of outside air into the reservoir,in aid of a freer flow of paint to the valve core.

The reservoir unit 14 is moved from the position of FIGURE 2 to theposition of FIGURE 3, by rotating the handle rearwardly and upwardlyuntil the lug 108 comes across the retaining plate 110 and enters theslot 118, whereby the handle and the reservoir unit are held in the newposition.

Although there has been shown and described a preferred form of theinvention, it is to be understood that the invention is not necessarilyconfined thereto, and that any change or changes in the structure of andin the relative arrangements of components thereof are contemplated asbeing within the scope of the invention as defined by the claimsappended hereto.

What is claimed is:

1. In combination, a paint roller unit comprising a frame having a shafthaving a free end and another end, a paint roller journaled on the shaftand spaced from said ends, a lateral portion on said other end of theshaft and terminating in an arm parallel spaced from the shaft, and ahandle bar fixed to and extending at right angles to said arm, a paintreservoir unit comprising a reservoir extending along the roller andsupported on the shaft above the roller, said reservoir having a valvechamber at its lower end opening to the surface of the roller, anddownwardly extending brackets on the reservoir journaled on the shaft,said reservoir being of downwardly tapering cross section and having endwalls and downwardly convergent front and rear walls, said front andrear walls having lower end portions which define a restricted throatleading into said chamber, a rotary valve core positioned in thechamber, spring means on the reservoir biasing the core upwardly toclose the throat, and means for rotating the core.

2. In combination, a paint roller unit comprising a frame having a shafthaving a free end and another end, a paint roller journaled on the shaftand spaced from said ends, a lateral portion on said other end of theshaft and terminating in an arm parallel spaced from the shaft, and ahandle bar fixed to and extending at right angles to said arm, a paintreservoir unit comprising a reservoir extending along the roller andsupported on the shaft above the roller, said reservoir having a valvechamber at its lower end opening to the surface of the roller, anddownwardly extending brackets on the reservoir journaled on the shaft,said reservoir being of downwardly tapering cross section and having endwalls and downwardly convergent front and rear walls, said front andrear walls having lower end portions which define a restricted throatleading into said chamber, a rotary valve core positioned in saidchamber, spring means on the reservoir biasing the core upwardly toclose the throat, means for rotating the core, and spaced stop means onone of said brackets adapted to engage portions of the frame inoppositely-angled positions of the reservoir relative to the frame.

3. In combination, a paint roller unit comprising a frame having a shafthaving a free end and another end, a paint roller journaled on the shaftand spaced from said ends, a lateral portion on said other end of theshaft and terminating in an arm parallel spaced from the shaft, and ahandle bar fixed to and extending at right angles to said arm, a paintreservoir unit comprising a reservoir extending along the roller andsupported on the shaft above the roller, said reservoir having a valvechamber at its lower end opening to the surface of the roller, anddownwardly extending brackets on the reservoir journaled on the shaft,said reservoir being of downwardly tapering cross section and having endwalls and downwardly convergent front and rear walls, said front andrear walls having lower end portions which define a restricted throatleading into said chamber, a rotary valve core positioned in thechamber, spring means on the reservoir biasing the core upwardly toclose the throat, and means for rotating the core, said front wallhaving a lower portion angled away from the rear wall, and having alower edge bearing upon the surface of the roller, [the upper end ofsaid lower portion and the rear wall defining said restricted throat,said valve core being cylindrical, said core having longitudinallyspaced passages along one side thereof adapted to provide for flow ofpaint from the reservoir to the chamber when the core is rotated to anopen position.

4. In combination, a paint roller unit comprising a frame having a shafthaving a free end and another end, a paint roller journaled on the shaftand spaced from said ends, a lateral portion on said other end of theshaft and terminating in an arm parallel spaced from the shaft, and ahandle bar fixed to and extending at right angles to said arm, a paintreservoir unit comprising a reservoir extending along the roller andsupported on the shaft above the roller, said reservoir having a valvechamber at its lower end opening to the surface of the roller, anddownwardly extending brackets on the reservoir journaled on the shaft,said reservoir being of downwardly tapering cross section and having endwalls and downwardly convergent front and rear walls, said front andrear walls having lower end portions which define a restricted throatleading into said chamber, a rotary valve core positioned in thechamber, spring means on the reservoir biasing the core upwardly toclose the throat, and means for rotating the core, said front wallhaving a lower portion angled away from the rear wall, and having alower edge bearing upon the surface of the roller, the upper end of saidlower portion and the rear wall defining said restricted throat, saidvalve core being cylindrical, said core having longitudinally spacedpassages along one side thereof adapted to provide for flow of paintfrom the reservoir to the chamber when the core is rotated to an openposition, said lower front wall portion having longitudinally spacedchannels facing into the chamber with which the passages of the valvecore register in the open position of the core.

5. In combination, a paint roller unit comprising a frame having a shafthaving a free end and another end, a paint roller journaled on the shaftand spaced from said ends, a lateral portion on said other end of theshaft and terminating in an arm parallel spaced from the shaft, and

a handle bar fixed to and extending at right angles to said arm, a paintreservoir unit comprising a reservoir extending along the roller andsupported on the shaft above the roller, said reservoir having a valvechamber at its lower end opening to the surface of the roller, and

downwardly extending brackets on the reservoir journaled on the shaft,said reservoir being of downwardly tapering cross section and having endwalls and downwardly convergent front and rear walls, said front andrear walls having lower end portions which define a restricted throatleading into said chamber, a rotary valve core positioned in thechamber, spring means on the reservoir biasing the core upwardly toclose the throat, and means for rotating the core, said front wallhaving a lower portion angled away from the rear wall, and having alower edge bearing upon the surface of the roller, the upper end of saidlower portion and the rear wall defining said restricted throat, saidvalve core being cylindrical, said core having longitudinally spacedpassages along one side thereof adapted to provide for flow of paintfrom the reservoir to the chamber when the core is rotated to an openposition, said lower front wall portion having longitudinally spacedchannels facing into the chamber with which the passages of the valvecore register in the open position of the core, said rear wall havingteeth in its lower edge bearing upon the surface of the roller.

-6. In combination, a paint roller unit comprising a frame having ashaft having a free end and another end, a paint roller journaled on theshaft and spaced from said ends, a lateral portion on said other end ofthe shaft and terminating in an arm parallel spaced from the shaft,

and a handle bar fixed to and extending at right angles to said arm, apaint reservoir unit comprising a reservoir extending along the rollerand supported on the shaft above the roller, said reservoir having avalve chamber at its lower end opening to the surface of the roller, anddownwardly extending brackets on the reservoir journaled on the'shaft,said reservoir being of downwardly tapering cross section and having endwalls and downwardly convergent front and rear walls, said front andrear walls having lower end portions which define a restricted throatleading into said chamber, a rotary valvecore positioned in the chamber,spring means on the reservoir biasing the core upwardly to close thethroat, and means for rotating the core, a handle extending laterallyfrom an intermediate pant of the valve core, said lower wall portionhaving a slot through which the handle works.

7. In combination, a paint roller unit comprising a frame having a shafthaving a free end and another end, a paint roller journaled on the shaftand spaced from said ends, a lateral portion on said other end of theshaft and terminating in an arm parallel spaced from the shaft, and ahandle bar fixed to and extending at right angles to said arm, anelongated paint reservoir unit comprising a reservoir extending alongthe roller and supported on the shaft above the roller, said reservoirhaving a valve chamber at its lower end opening to the surface of theroller, and downwardly extending brackets on the reservoir journaled onthe shaft, said reservoir being of downwardly tapering cross section andhaving end walls and downwardly convergent front and rear walls, saidfront and rear walls having lower end portions which define a restrictedthroat leading into said chamber, a rotary valve core positioned in saidchamber, spring means on the reservoir biasing the core upwardly toclose the throat, and means for rotating the core, spaced stop means onone of said brackets adapted to engage portions of the frame inoppositely-angled positions of the reservoir relative to the frame, thebrackets being mounted on the reservoir for longitudinal adjustmentrelative to the reservoir.

8. In combination, a paint roller unit comprising a frame having a shafthaving a free end and another end, a paint roller journaled on the shaftand spaced from said ends, a lateral portion on said other end of theshaft and terminating in an arm parallel spaced from the shaft, and ahandle bar fixed to and extending at right angles to said arm, anelongated paint reservoir unit comprising a reservoir extending alongthe roller and supported on the shaft above the roller, said reservoirhaving a valve chamber at its lower end opening to the surface of theroller, and downwardly extending brackets on the reservoir journaled onthe shaft, said reservoir being of downwardly tapering cross section andhaving end walls and downwardly convergent front and rear walls, saidfront and rear walls having lower end portions which define a restrictedthroat leading into said chamber, a rotary valve core positioned in thechamber, spring means on the reservoir biasing the core upwardly toclose the throat, and means for rotating the core, the brackets beingmounted on the reservoir for longitudinal adjustment relative to thereservoir, said brackets comprising plates having upper and lowerportions, laterally inwardly extending arms on said plates slidably andsupportably engaged with the front wall of the reservoir, said frontwall having a lower portion angled away from the rear wall, said lowerportion having longitudinal channels in which said lateral arms areslidably confined, the lower portion of one bracket having a holereceiving the shaft of the roller frame, said lower portion of said onebracket having a laterally outwardly extending first stop lug at itsupper edge and a laterally outwardly extending second stop lug on itslower edge and spaced longitudinally from the first stop lug and locatedat opposite sides of the roller shaft, and a retaining plate engagedwith the laterally outward side of said one bracket having an upperedge, means securing the retaining plate non-rotatably to said lateralframe portion, said first lug being engageable with the retaining plateto suppont the reservoir in a forwardly overbalanced position relativeto the roller unit frame with the handle in an upright position, saidsecond lug being engageable with the retaining plate to support thereservoir in a forwardly inclined position with the roller unit frame ina pendant position.

9. In combination, a pain roller unit comprising a frame having a shafthaving a free end and another end, a paint roller journaled on the shaftand spaced from said ends, a lateral portion on said other end of theshaft and terminating in an arm parallel spaced from the shaft, and ahandle bar fixed to and extending at right angles to said arm, anelongated paint reservoir unit comprising a reservoir extending alongthe roller and supported on the shaft above the roller, said reservoirhaving a valve chamher at its lower end opening to the surface of theroller, and downwardly extending brackets on the reservoir journaled onthe shaft, said reservoir being of downwardly tapering cross section andhaving end walls and downwardly convergent front and rear walls, saidfront and rear walls having lower end portions which define a restrictedthroat leading into said chamber, a rotary valve core positioned in thechamber, spring means on the reservoir biasing the core upwardly toclose the throat, and means for rotating the core, the brackets beingmounted on the reservoir for longitudinal adjustment relative to thereservoir, said brackets comprising plates having upper and lowerportions, laterally inwardly extending arms on said plates slidably andsupportably engaged with the front wall of the reservoir, said frontwall having a lower portion angled away from the rear wall, said lowerportion having longitudinal channels in which said lateral arms areslidably confined, the lower portion of one of said brackets having ahole receiving the shaft of the roller frame, said lower portion of saidone bracket having a laterally out wardly extending first stop lug atits upper edge and a laterally outwardly extending second stop lug onits lower edge and spaced longitudinally from the first stop lug andlocated at opposite sides of the roller shaft, and a retaining plateengaged with the laterally outward side of said one bracket having anupper edge, means securing the retaining plate non-rotatably to saidlateral frame portion, said first lug being engageable with theretaining plate to support the reservoir in a forwardly overbalancedposition relative to the roller unit frame with the handle in an uprightposition, said second lug being engageable with the retaining plate tosupport the reservoir in a forwardly inclined position with the rollerunit frame in a pendant position, said retaining plate having a slotreceiving the arm of the roller frame.

10. In combination, a paint roller unit comprising a frame having ashaft having a free end and another end, a pain roller journaled on theshaft and spaced from said ends, a lateral portion on said other end ofthe shaft and terminating in an arm parallel spaced from the shaft, anda handle bar fixed to and extending at right angles to said arm, a paintreservoir unit comprising a reservoir extending along the roller andsupported on the shaft, said reservoir having a valve chamber opening tothe surface of the roller, and a rotary valve core supported within thechamber, means for rotating the valve core, said reservoir beingpositioned above the roller, and downwardly extending brackets on thereservoir journaled on the shaft, said brackets each having an armslidable in a channel formed in the adjacent end reservoir Wall foraccommodating rollers of different lengths.

11. A fountain paint roller assembly comprising a vertical elongatedreservoir having front and rear walls having spaced lower edges, saidwalls having convergent portions which define a restricted throat spacedabove said lower edges, the space within the reservoir below saidrestricted throat being a valve chamber, the front wall portion definingsaid chamber having longitudinally spaced channel means opening to itslower edge, the rear wall portion defining said chamber havinglongitudinally spaced opening means opening to its lower edge, saidreservoir having end walls portions of which form end walls for thevalve chamber, a cylindrical valve core extending across the reservoirin said chamber, said core being larger in diameter than the restrictedthroat, spring means on the reservoir urging said valve core up toclosing relationship to the throat, said core having longitudinallyspaced notches in one side thereof, and means for rotating the valvecore on its axis from a throat closing position to an open positionwherein its notches provide communication between the reservoir abovethe throat and said valve chamber, and a paint roller connected to thereservoir with its upper surface in contact with the lower edges of thefront and rear walls of the reservoir and closing the lower end of thevalve chamber.

References Cited in the file of this patent UNITED STATES PATENTS826,897 Shely July 24, 1906 2,988,769 Panfil June 10, 1961 FOREIGNPATENTS 7,310 Great Britain of 1893 43,314 Norway Oct. 25, 1926 878,167Germany June 1, 1953

1. IN COMBINATION, A PAINT ROLLER UNIT COMPRISING A FRAME HAVING A SHAFT HAVING A FREE END AND ANOTHER END, A PAINT ROLLER JOURNALED ON THE SHAFT AND SPACED FROM SAID ENDS, A LATERAL PORTION ON SAID OTHER END OF THE SHAFT AND TERMINATING IN AN ARM PARALLEL SPACED FROM THE SHAFT, AND A HANDLE BAR FIXED TO AND EXTENDING AT RIGHT ANGLES TO SAID ARM, A PAINT RESERVOIR UNIT COMPRISING A RESERVOIR EXTENDING ALONG THE ROLLER AND SUPPORTED ON THE SHAFT ABOVE THE ROLLER, SAID RESERVOIR HAVING A VALVE CHAMBER AT ITS LOWER END OPENING TO THE SURFACE OF THE ROLLER, AND DOWNWARDLY EXTENDING BRACKETS ON THE RESERVOIR JOURNALED ON THE SHAFT, SAID RESERVOIR BEING OF DOWNWARDLY TAPERING CROSS SECTION AND HAVING END WALLS AND DOWNWARDLY CONVERGENT FRONT AND REAR WALLS, SAID FRONT AND REAR WALLS HAVING LOWER END PORTIONS WHICH DEFINE A RESTRICTED THROAT LEADING INTO SAID CHAMBER, A ROTARY VALVE CORE POSITIONED IN THE CHAMBER, SPRING MEANS ON THE RESERVOIR BIASING THE CORE UPWARDLY TO CLOSE THE THROAT, AND MEANS FOR ROTATING THE CORE. 